Exhaust filter arrangement for vacuum cleaner housing

Details Exhaust filter arrangement for vacuum cleaner housing Exhaust filter arrangement for vacuum cleaner housing

2007-10-23

2007-10-23

Snider, Theresa T. (Department: 1744)

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

C015S327200

Reexamination Certificate

active

10773666

ABSTRACT:
An exhaust filter unit is arranged outwardly surrounding at least a major portion of a housing of a vacuum cleaner. The dirt-laden incoming airflow is filtered through a primary filter, then blown by a suction motor unit into an annular exhaust air space between the vacuum cleaner housing and the exhaust filter unit. Thereby, the filtered air is exhausted in a diffused manner through the large surface area of the exhaust filter unit. Preferably, the exhaust filter unit has a cylindrical tubular configuration that completely externally surrounds a cylindrical portion of the vacuum cleaner housing.

REFERENCES:
patent: 3516110 (1970-06-01), Nilsson
patent: 3883922 (1975-05-01), Fleischhauer
patent: 4437204 (1984-03-01), Guhne
patent: 4831682 (1989-05-01), White
patent: 5687450 (1997-11-01), Stein et al.
patent: 2004/0003480 (2004-01-01), Kovacs
patent: 0706774 (1996-04-01), None

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